Resistance unit



April 14, 1931. L. KEBLER RESISTANCE UNIT Filed May 8 1926 anuemfoz 953/Qua/$40,134

' Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE LEONARD KEBLER, OFBRONXVILLE, NEW YORK, ASSIGNOR TO WARD LEONARD ELEC- TRIC COMPANY, A.CORPORATION OF NEW YORK nnsrs'rlmcn um'r Application filed May 8, 1926.SerialNo. 107,584.

This invention relates to resistance units and supporting meanstherefor. A

In the form of unit herein disclosed, the resistive conductor is carriedon an insulating tube or similar supporting body, and one object of theinvention is to provide an improved means for supporting said tube orother body from one end thereof, and also to provide means whereby aplurality of such tubes may be supported in spaced relation to oneanother. A further object is to provide an improved resistance unitwherein the circuit terminals of the unit form a supporting means forthe unit. A further object is to provide an improved means forsupporting a plurality of resistance units in such a manner that each ofthe units may be readily removed from the support without disturb= ingthe other units. Other objects include simplicity and strength ofconstruction and economy of manufacture. Other objects and advantages ofmy invention, will appear from the following description taken inconnection with the accompanying drawing, wherein Fig. 1 is a sideelevation, partly broken away, of the resistance unit and mounting.

Fig. 2 is a top plan view of the structure shown in Fig. 1.

Fig. 3 is a side elevation showing the manner ofmounting a plurality ofresistance units.

The body portion of the unit comprises a tube 10'of earthenware,porcelain or other suitable insulating material. The resistive conductor13 is wound around the tube and held in place and protected by aninsulating adhesive enamel coating 14, or other protective coating.Extending through the tube 10 at one side thereof is a conductor or lead15 shown as a narrow strip of copper. The upper end of the strip 15 1sbent outwardly and flat-wise .through a notch 16 at the upper end of thetube 10. A few turns of the resistive conductor 13 is wrapped ,laroundthe end of the strip which end is bent over on itself to firmly clampthe resistive conductor and also bent down against the tube 10. Thelower end of the strip 15 extends out of the tube through a notchtherein and is bent laterally and has an enlarged end which is rigldlysecured to an insulated supporting base or strip of fibre 21 by a metaleyelet 22, which extends through an opening in the end of the strip 15and in the supporting base 21 and is headed over to clamp the partstogether, the lower part of the rivet being in a countersunk portion ofthe base.

The other end of the resistance wire is connected to a metal terminalclip 23 which is formed of a piece of copper having a central lug 24extending through a slot in the lower end of the tube and upwardly intothe tube 10 and bearing against the inner wall of the tube. This lug 24;is stamped out from the body of terminal 23 and bent inwardly andupwardly as already stated and as shown in Fig. 1. The terminal 23'isalso formed with an upwardly extending side lug 25 which extendsupwardly along the outer wall of the tube 10.- The resistive conductor13 is wrapped around the lug 25 near its upper end; and the end is thenbent over against itself to firmly clamp the resistive conductor. Theinsulating coating 14 is applied to and embeds the resistive between theresistive conductor and the strip 15 and the lug 25. 4 The terminal 23is secured to the base 21 by an eyelet 28 which passes through openingsin the terminal and base 21', the lower part of the base beingcountersunk'to receive the rivet.

The conductor 15 and terminal 23, not only form circuit connections forthe resistive conductor, but also serve to support and position theresistance unit.

Extending through the eyelets 22 and 28" are clamping and conductingscrews 26, which are formed at their outer ends with unthreaded portions27 of a reduced diameter,

having openings 28 therein which receive the circuit conductors.

The units may be mounted upon a metal supporting plate or bar 29, andFig. 3 'shows the manner in which'a plurality of units may be supportedon the bar 29. The screws 26 of each of the resistance units extendthrough openings in the bar 29 and are insulated therefrom by means ofbushings 30. A washer 31 engages each bushing and a nut 32 on 1C0 eachof the screws locks the parts firmly in position.

I claim 1. In a device of the class described, a metal plate, a row ofresistance units carried thereby, each'unit comprising a body memberandresistive conductor wound thereon, terminal connections joined to ,saidconductor and extending from the same end of said body memher forsupporting said body member, and

means forsupporting said connections and parts carried thereby on saidplate, said means forming circuit terminals for said units.

2. In a device of the class described, a metal plate, a row ofresistance unitscarried there'- by, each unit comprising a body memberand resistive conductor Wound thereon, terminal connections joinedtosaid conductor and ex tending from 'the same end of said body memher forsupporting said body member, and means for supporting said connectionsand parts carried thereby on said plate, said means ,forming circuitterminals for said units and comprising conducting screws passingthrough said connections and plate and insulated from said plate.

3. A resistance unit comprising a cylindri- .cal member having anopening therethrough extending in an axial direction, a "resistiveconductor wound on said member, a metal member extending through andcontacting with the inner wall of said opening and secured to saidconductor at the outer end of said cylindrical member and projecting outsidewise from the inner end of said cylindrical member, and a metalmember embracing the inner and outer walls of said cylindrical member atthe inner end thereof over a portion of its circumference and secured tosaid conductor and also projecting out sidewise from the inner end ofsaid cylindrical member, said metal members and projections beingadapted to hold said unit in a fixed upright position and to formterminal connections.

. 4. A resistance unit comprising a cylindrical member having an openingtherethrough extending in an axial direction, a resistive conductorwound on said member, a metal strip extending. through said opening andcontacting flatwise with the inner wall of said opening and embracingthe outer wall and connected to said conductor at the outer end of saidcylindrical Iiiember and projecting out sidewise from the innerend ofsaid cylindrical member, and a sheet metal member embracing flatwise theinner and outer walls of said cylindrical member at the inner endthereof over a portion of its circumference and secured to saidconductor, .and also projecting out sidewise from the inner end of saidmember, said metal strip and sheet metal member and projections thereofbeing adapted to Hold said unit in a fixed upright position and to formterminal connections.

5 A resistance unit comprising a cylindrical member having an openingtherethrough extending in an axial direction, a resistive conductorwound on said member,'a metal strip extending through said opening andcontacting flatwise with the inner wall of said opening and embracingthe outer wall and connected to said conductor at the outer end oof saidcylindrical member and projecting out sidewise from the inner end ofsaid cylindrical member, a sheet metal member embracing flatwise theinner and outer walls of said cylindrical member at the inner endthereof over a portion of its circumference and secured to saidconductor, and also projecting out sidewise from the inner end of saidmember, said metal strip and sheet metal member and projections thereofbeing adapted to hold said unit in a fixed'upright position and to formterminal connections, an insulating base against which the inner end ofsaid cylindrical member rests, and means for securing said projectionsto said base.

LEONARD KEBLER

